added routing

lib/pages/dashboard_page.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class Dashboard extends StatelessWidget {
+  const Dashboard({super.key});
+  static const routeName = '/';
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Dashboard'),
+      ),
+    );
+  }
+}